Question

(x+y) (x-y) (x^2+y^2)​

Answer 1

Answer:

(x+y) (x-y) (x^2+y^2)

= (x^2 - y^2) (x^2 + y^2)

{ by using identity (a+b)(a-b)= a^2 - b^2}

= x^4 - y^4